Time________ very fast and a new year will begin soon.
A. goes by
B. takes off
C. gets off
D. pulls up
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I didn’t answer the phone________ I didn’t hear it ring.
A. unless
B. if
C. otherwise
D. because
We’re going to________ the task that we haven’t finished.
A. keep up
B. carry on
C. take away
D. set up
The general manager sat there, ________to the report from each department.
A. listen
B. to listen
C. was listened
D. listening
Because light travels (fast) ________than sound, lighting is seen before thunder (雷) is heard.